Helps to provide backward-compatibility with plugins that use legacy components. Warning: This is an
internal utility component that is only public for technical reasons, it is not part of the public API. In
particular, this component can be changed or deleted without prior notice.

DefaultLegacySupport

setSession

Sets the currently active session. Some legacy components are basically stateful and their API is missing
parameters that would be required to delegate to a stateless component. Saving the session (in a thread-local
variable) is our best effort to record any state that is required to enable proper delegation.